A LOT of people have made good points to both sides of the subject, but I'll give you a good rundown from multiple perspectives on the integration of such a concept. Now do notice that this isn't to put your post down as I believe some people would actually enjoy this. Yet I'd like to only give more perspective onto the subject at hand:
Players-
Pro's:
- Creates more Commanding Positions.
- Gives people the chance to verse their friends.
- Generates more positions to fill and manage giving people a chance to lead without mass amounts cluttering their chance to get promo'ed.
- More lore may be introduced.
- Opposition is now being used with Player characters that will give a more versatile outlook on combat usage and capabilities of different tactics.
- Gives off time from events an actual place to do something during the cool down period.
Con's:
- PvP/E can create an overwhelming amount of enemies for one side, or the other.
- AI PvE units may not be able to tell which force to shoot at, resulting in the PvE/Usage of NPC will be unavailable.
- Creation of additional units may be harder to manage as corruption, tenure of hiatus, and general consolidation of training/creating training documents will be harder to manage of those who may not be ready for such power.
- Rank pushes are definitely going to be found during this time, as some positions need to be filled, but will more than likely end horribly.
- You have a very high chance of gaining a RDM notice as Rules of Engagement (RoE) would have to be changed to accommodate for the new faction.
- As previously stated, Toxicity will greatly increase as Player Characters are more than likely to gain a unfair advantage at some point somehow.
- An addition to the previous, the server will more than likely add more class donations, which will more than likely a SSW, Single Shot Weapon. These may be obtained by a certain force, which will greatly decrease RP capabilities. Thus being presented that one side will complain as the spawn will be too far and killing would just end in a single shot without any possibilities of retaliation.
- Activity for some sides may be short handed as some people may be overwhelming on one side due to a larger opposition of people joined one, or the other side. Equality can't be generated as it would ruin one's experience.
Server-
Pro's:
- Gains an additional unit to create more donation items that'll increase server revenue.
- Gives diversity between other servers.
Con's:
- Server will have to compensate for space on both sides.
- Additional uniforms/Models would have to be provided for a side.
- Armaments such as guns/munitions/melee's would have to be generated for the new faction depending on Lore based facts.
- New stuff equals more stuff to fix more than typical.
- Creating too many factions could be hard for the server to compensate as it would need, as said before, space for spawning and safety (F.O.B.).
- Lag and disconnection has already been known as a general problem due to a mass of prop usage, it's fine now, but in combat will lead to complications.
- Server handling for possible intense firefights that may include heavy armaments (Grenades, Launchers, etc.) may provide a stress test to what the server can really handle.
- Generating a continuous stream of people to each side might create complications of spawning, gun fights, and add ons may break each other.
Staff-
Pro's:
- You know I'm not really sure how this would help them staff...
Con's:
- A bunch of tickets will be generated for PvP actions that would be considered accident, on purpose, or under deliberation for false statements. (ex. Someone minges to create a situation to where a KoS is allowed. Although the minger gets a case out of it and wins. Giving false accusations to the wrong people)
- Staff will have to deal with people who might require additional assistance in certain jobs.
- Additional training will have to be provided to those of staff, since they'll have to know a new addition of a faction.
- Creates more problems on how they should be placed within a event.
- Game makers will have to generate equality between AI/Player usage.
- Places a conundrum of briefing on both sides, which will take longer to start the event.
- Missions will be determined on how long both sides want to participate. Events have a plan, but things can have adverse changes in event planning when dealing with PvP.
- Factions can get harder to deal with as training would have to be verified additionally.
- Tickets will be made for a various amounts of reasons between each faction for reasons that'll be made when dealing with PvP actions.
Now this is all the stuff that I could generally come off to making an estimated guess on much experience and hypothesis on the variables/subject at hand. Hopefully this gives you insight on the Pro's and Con's with it's integration into the server. It's not a terrible idea, but might not be suitable for the server.
